Gripping device



2 Sheets-Sheet l C. R. MILLAR ET A1.

GRIPPING DEv1cE Filed oct. 11, 1929 "eu 'L 1 Inventors 6.' R Millar Shoo/mn :v

by 0. 5.29.: J

Attorney.

Aug. 12, 1930.

Aug. l2, 1930. QR. MILLLAR sfr AL 1,772,727

' GRIPPING DEVICE' i Filed oct. 11, 1929 2 sheets-sneer. 24

l Inventors CR: /Yl'llaf .leasedthevehiclffxaforexample;

A aetiono'f gravity upon an'incline;N

,Y Y i vice is moved orrotatedintoaj-jpositio 13757 which thereleaslng armrcease'sgtoservej 'y part withtvvhiclioneofltheljavvsorfpa l Y part-ofthe gripping tent suiicient :completely yto re cableor'haulagemember; j .e f i v45 According totheinventifonone.jawor part Patented A'ug. 1:2,

`This invention relates '1to1 gripping fdevices and is especially conceivedinits 'application to trucks or other vehicles that whileubeing adapted for rope orfcable haulage by afgrip FI pingldevicecarrieduponthe vehicleare pro-4 vided with such a device that is adaptedfto release'the rope of cablewhen, forexample, the truckflor-vehicle has arrivedat atposition at which it has tofbe released inforderthat 1 itmay then move under theV action-of gravity;v

but" the invention is of i Wide, application to' gripping devices for other: and; similar/purf poses. It will be understoodthatinitsappli:

cation to trucks orvehicles that are adaptedI 15 for rope haulage bythe provisionfoffafgrlp'f ,ping device, the invention has amongitsoh l a ]ects to permit-of theA ready,instantaneoufs.

and completeV disengagement of the rope,r ble or other Y haulage member yand"to'-z`wo1d v 20 damage or 'strain to vthe parts ofthe gripping y device ort-o the vehicleor to, theropeor tof the'haulage member such as'might/jresuglt'onan Ailficomplete disengagement 'and partlalfre. unearth@ According to the invention vv g y v iiclin'edn plane 0nv a ramp" Set, ,f *St @itlllaY-ykv position prior adiacllf ,tothe fpkj aduS, 19: cated with respect toy areleasing 'arm Prc?? 3 vided or depending from the gripping de.

vice' carried bi the ,vehifilesfppeingipn the track that on .the truck orkvehiclegpassingfthe Vramp thenreleasing of the Vgripping[jd 'stop against thev rearwafdfmovmet the grippingy'device fis ,connected re 'runder the operation'fof aspring" the-tja moves lfIOI'n-v the' .engaged position ftfen l. yease-.theeV rope ofv the gripping device "so mounted ythat tj, is,` adapted# to fbefadjusted inl position with i respectv to ,al 'partyron which Zfit-fis' mounted fin such mannertha't uponvvear of the i-op'eoriv y50` thefaces of therespectivev jaws of,the*{gi-ip;` i;

cordin'g to theinvention.

pingfdevice-the'jawl orfpartireferred tomay 'l beadjusted in position to take upjthe Wear.

They invention' comprises the featreshereinafterldescribed. g u

Thfe'invention is illustratedfinthe accom 'miams noBERT mL'LAnAiIn noimiesfs'noirosrimcnni, or noNnoN, ENGLAND panyingl diagrammatic drawings by-Way'of Y gri-'pirigfdeyfice is'secured toa supporting i or; aseplatjfbandthesecond or movable" 'jayv'` e ris carried byja spindle d mountedina bess' a neatly attedrwithin the bore Qf a cylm-l I provided` ac-Y provided i der orrame,part Vyalso secured tojtheplate bl The)bosse"isprevented from r'otating'fin--` Ltpheeylinder by means' of a '1ongitudirmlv key Y el'ffeng'ging ai"keywav f1. 1 The/bossi emay alsof' befprovd'edfwith a Harige or enlarge- 'mentfezcorres'ponding in diameter to a part" .fzjof the'breoffthe cylinder ofenlarged di# arneterivithin which it is received se that the @redete registergwit Sain theinneefposition age member .It againstatlieffixedjj aw a; The releasinglarmqg th'u's acts' 'ase a stop *tov main;

asl 1 i Ufff l d l A lll mehr diseased acesof the Sansa, may; besujtahly fqrmed'v.vithrecesses in.

Y Y n. 1,772,711?Y tain the boss e and the jaw c in the engaged `position against the action of a helical sprin i tendin to force the boss e rearwardly and dispose around the Vspindle dl between a i 5 bearin bush e* in the boss e and a retaining .Y

plateV When, however, the wheel g2con tacts with andfrides up fase the ramp {(Figuil 8)1 at the detninp sition, the releasing arm g is rotated on itsu 4w pivot in g1 until it passes out of the recess of bosse, sotlmttheboss@ lesphdl'e( d and the 'aw c may be retracted under the action of kt e spring i to release the memberjt. y i .f f t.

15 The ffrin ofthe releasing a'ni isadvv tageously such that it isymaint'amad in rotatedor u lifted position by the uxalldv surface of t e bosse, the wheel g2 being ref ceived into one of two correspendingmetisses n f Vformed4 in the outer wall of the,Y f. lhe releasing arm is thusv maintained inepezaftive until the jaw cis again caused tofengpge, the haulage member lu The haulage-member jh may beV rta-engaged me'relyby oreing the n s indle d inwards and withit the hope, so tat the recessie,5 in the periphery ef tlefbess e may again vcome to lie in coincidence with Y the releasing arm g whereby the latter"y lmayA again pass into positionto serveas eshop te D the boss e and to holdA the jew e in the tion at. which the` haulage: member h. iaenorder to permit of-.Yadjastment :Een

ef thejaws a. and a, the spindle, d sadvenf- Il tageously serevv-threadedV a-t d* to' the. eornespondiugly screw-threaded here et the hess-e and thegaw-e is rotatably apen that.; Spindle, being maintained ui` theme11 by means of a collsrdreived' inte.

H sgslptfer recess o? of the jaw c and, it ngeessas, b" a similar collar d at' the near ottherilluan r e jaw a is .constrained fromE rotation,religi-- tively to thev jaw a either-"iny tlieelagllged disengaged position by means aiY 4pins.` s*

m mounted therein parallelwith--the exisat Spindle d and slidably engasiflgfhnlbs in. the iawa, and bythe everhanging a thea `ItwillV furthermore beRnderMQtht 311 i l weer endefspindled eppositeto at;

- whh. the gripping 1am a isv mlmtedrw nv:

vided with1 a wheeld by'whichlthmmin e@ tei. hie mevsbl sw ein themnnne y w sez-ined, whene'bgre ative movement is UPB Hihi@ between t 1r spindle d `and thefjgw@ Y eegriedhyitwth' refereheeto-.the blslmcrlf` mngrithe spindle-ff l Y will `fmthieririlorelles understand that tbn Vfes the aceommedstion. www themoithe ropecable .or haulage It; that the cylxn er or: frame f may have a1 'EN msplata f atitsouterfendundpthnt the gl'l p device is dis osed transversel to the me repeor )um y 75 h extend outwardly with the wheel d* so dishauege posse asto be convenient of access lfor the ad- 'gustmentrof' ythe/movable grippingjaw c for the' ccuodation ofwe'ar '1n the` nianner- 80 It be understwd that the invention is not; to thev constructional features lavelbeare described but that the construe. tinmnyhemodiedwithout departingrfrom .5` mamon. t xWelalm-f t 1 v gripping device, comprising a janvi remmrahle-rV jaw, Ya vcarrier, for the said f 'movable idw, a sup. orting part in whichth ,qi

saiduarnier isdsh `alllil miunted, a release mmh t frime im t e Sai Support" am# adapte@ when the gripping 'aiiggarlixd dieroperative position, to retain e movable jaw, and `an element, such as a spring, to .i

the movable 'awout of theoperativa neiltimi4 when refused by. mm

1;. r y y 5;, A; device, com 'rising'la im@ n10-Y y valira: jaw,.a bossb which the 'sai sig-l. lis supported, a fixe cylinder WV 'lipzthe said boss is sldably received, a member pivoted upon the said eyIiner andi adapte@ when the gripping-'awa' are 55 l operative position, te retain t e mov- AVJemand an element, such as a' sprixig'itq t. .y Wfthe movable Y{'aw out of the operativa` position; when re eased by"V the "rele jaw a'xova 1e jaw a s iind ecar Birma "wenn iw, a bo 'Ph whichrihegua lj' issp orted, s `xt: cylinder withi Sal kboss is slidaby reqeivedff pg *f i is@ N t ,pi'vte'din' the wall' of the cylinder an xilts nrmal myfbeeonveniently rotated fori-therme: 9 t

.sitio-n w trs-1w uw if@ 0f the eylih (goed, im resist-he Hsswhen the mqvameja ma MVG" osition.

` J4. A Igng deviens @time in tra a; svn-eem em is pmideewiei a mess yengages the, said recess. when.: like bees 1M operatively engagedf.

EMA. ing denied. comprising ajixq jaw, afnmvzatblefjaw, 'a' carrier `for: tlmai menblejswta supznting part inrwhinhithe widY lcarien `isf sli hlyl'mouuted, ug h supporting part and fixed-jaw being mounted l i upon the under-side offa railroadvehicle adapted for haulage by a flexible mel'nber,V over a rail track, a release member pivoted to the said supporting part and adapted, when the gripping jaws are in theo erative 'posi'-A tion, to retain the movable ]aw,`a yramp e mounted upon the track in a position to act e upon the release memberto effect ,the release of the movable jaw, and an element, such yas aspring, to throw the movable jaw out ofthe ,j operative position when released kby the release member. f

6. A gripping device`,"comp;rising aviixe'df' jaw, a movable jaw, a carrier for the saidy f movable-jaw, means for permitting relative adjustment of the movable jaw upony thejsaid carrier, a supporting part in whichthe said carrier is slidably mounted, a release member pivoted tothe said supportingpart andI adapted, when the grippingjaws are in the operative position, to retain the movable.,V jaw, and an element, such as a spr1ngt'o throw the movable jaw out of they operative position when released by the release member.

7. A gripping device, comprisingia fixedr y jaw, a movable jaw, a spindle carrying the said movable jaw, a boss which the said spindle is supported so as to be relatively .ad` i justable in the direction of its axis, a fixed cylinder within which `the said boss is slidably mounted, a yreleasememberpivoted to n the said lcylinderand adapted, when the gripping jaws are in the operative position,

to retain the movablezjaw, and an element, v

such as a spring, to throw the movable .jaw out of the operative i by the release member.

8. A gripping devicefas set forth in claim V7,-Wherein the -spindle is sorewfthreaded `and' f the boss` is formed with a screw-threaded bore p l for the reception of the spindle and the mov.- able jaw is loosely mounted upon the spindle` and constrained from rotation relativelyto the fixed jaw.

CHARLES ROBERT MILLAR.y l DOUGLAS sHoLTo STJLWJHAN;v g

position when released 

